Get rid off fortran compiler usage for Lapack/Blas.
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FindLAPACK and FindBLAS check for the name mangling with added underline as a fallback, anyway. Hence there is no need for using a Fortran compiler. With this commit we now simply add another check for a LAPACK function to see whether it has an underline added and adapt the existing macro in config.h accordingly.
Closes #184 (closed)